Apparatus for coating metal sheets.



APPLICATION FILED JULY 24,1916.

Patented Oct. 23, 1917.

2 SHEETS-SHEET lui ar Imp rarnNr caries.

JAMES H. CAFFREY, or BEAVER. FALLS, PENNSYLVANIA, ASSIGNOR 'ro nsnns'rosrnorno'rnn METAL COMPANY, or PITTSBURGH, PENNSYLVANIA, A coarona- TIONOF PENNSYLVANIA.

APPARATUS FOR COATTN'G METAL SHEETS.

Original application filed October 14, 1914, Serial No. 866,685. Divided1916. Serial No. 110,856.

To all whom it may concern.

Be it known that 1, JAMES H. CArrRnx, a citizen of the United States,and a resident of Beaver Falls, in the county of Beaver and State ofPennsylvania, have invented an Implication Serial No. 866685 filed by meOctober 14, 1914.

The present invention relates to a novel apparatus for feeding a metalsheet into and through a kettle r vat containing a bath of asphalt orother adhesive coatlng material.

The particular features of this invention will be pointed out in theclaims at the end of this specification.

. Figure 1 is a side elevation of an apparatus embodying this invention.

Fig. 2, a plan view of the apparatus shown in Fig. 1. j

Figs. 3 and 4, details of one of the dis- I tributing or spreading rollsshown in Fig. 1.

Fig. 5, an enlarged section, taken on the line 55, Fig. 2, and

Fig. 6, an enlarged section, taken on the line 66, Fig. 1.

In the present instance, I haveshown one construction of apparatus in-which the metal sheets a, which may be ofrelatively "small size andsubstantially that of a shingle, are fed automatically by a feed member6 into a coating member 0, in which latter the metal shingle is providedwith a coating of liquid asphalt or other adhesive material.

In the present instance, the feed member I) is shown as an endlesscarrier or link chain 10, which is passed about sprocket wheels 12, 13,mounted upon shafts 14, 15,

suitably supported and located at the o posite ends of a guideway,formed by si e bars 16, 17, (see Figs. 2 and 6), whichare supported by aframework 18.-

The link chain 10 is moved in a substantially horizontal plane betweenthe side bars 16, 17, and is provided at suitable intervals with lugs orprojections 19, which serve as pushers for the metal shingle a to ushthe same forward into engagement wit a pair' Specification of LettersPatent.

and this application filed July 24,

of feed rolls 20, 21, mounted in boxes 22, 23, the upper feed roll beingpermitted to yleld with relation to the lower feed roll 21 by springs 24in a manner well understood.

The metal shingle a is fed by the feed rolls 20, 21, under a guide ordeflecting roll 25, which deflects the metal shingle'down into guideways26, 27,-formed byguide bars 28, 29, which extend lengthwise of akettleor vat containing adhesive material, preferably asphalt or like bitumen.

The kettle 30 may be heated in any suitable manner to keep the asphaltfluid. The

guide bars 28, 29, are curved, so that the metal shingle a on itspassage through the coating bath contained in the kettle or vat 30, willbe submerged in the coating bath or asphalt, so as to be entirelycovered by the same.

The metalshingle a is fed through the coating apparatus as shown, by aplurality ofpairs of feed rolls 31, 32, which .1. are mounted on shafts33, 34, journaled inboxes 35, 36 the upper roll 31 of each pair of feedrolls being yieldingly backed up by springs Patented Get. 23, 1917 37,so that the rolls 31 may move toward and away from the rolls 32 'tocompensate for different thicknesses in the shingles a and to impart theproper bite by the rolls 31, 32, upon the shingles.

The pairs of feed rolls 3 1, 32, are separated from one another byspaces, which are less than the length of the metal shingles.

At the delivery end of the kettle or vat 30, provision is made forspreading the asphalt or other coating material evenly over the greaterportion of the metal shingle, and for providing for-asurplus of asphaltat or near the transverse center of the metal shingle.

For this purpose, a pair of rolls 40, 41, are mounted uponshafts 42, 43,with which the upper shaft 42. journaled in boxes 44, which areyieldingly backed up by springs 45. The rolls 42, 43, are provided ontheir circumference with helical grooves or channels 46, 47. (see Figs.2 and 3), which extend from at ornear the center of the rolls towardtheir opposite ends, and said rolls are also provided with substantiallyparallel longitudinally extended grooves or channels 48, which intersectthe helical grooves.

These grooves serve to distribute the as phalt evenly over the shinglefrom at or near the side edges thereof to the transverse center thereof.The upper roll 40 may and 4 preferably will be provided substantially ator near its longitudinal center with an annular groove 49, which servesas a reservoir to hold a surplus quantity of asphalt.

The rolls 40, 41, also act as feed rolls to feed the coated metalshingle out of the kettle or vat 30. The rotatable members of theapparatus may be operatively connected through suitable gears 90 with asuitable driving shaft (not shown).

In the present instance, the metal sheet is described as a metal shingleand is shown of a size approximately that of the ordinary shingle, butit is not desired to limit the invention to an apparatus for handlingmetal shingles, as it is evident that it can be proportioned andarranged to handle metal sheets of any desired size within limits.

The operation of the apparatus may be briefly described as followsAssume that the kettle 30 is heated and the asphalt bath containedtherein is fluid. The operator sets the feed mechanism in motion in aknown manner. He then places the shingles a upon the link chain 10between the lugs 19, and each shingle is delivered to the feed rolls 20,21, which feed it under the roll 25, by which it is deflected down intothe guideways 26, 27, in the kettle 30, andis fed forward into and outof the bath of the fluid asphalt by the rolls 31, 32. The metal saidrolls serve to carry the surplus asphalt away from the side edges of therolls and toward the transverse center of the same and into the annulargroove 49, wherein it is retained to provide a surplus for cementingoverlapping portions of a covering which may be applied to the coatedmetal sheet as described in my original application above referred to,which covering is not herein shown.

Claims.-

1. In an apparatus of the character described, in combination, a kettlefor containing a bath of adhesive material, means for feeding a metalsheet through said bath to coat the metal. sheet with adhesive material,and means for spreading the coating material evenly and laterally overthe surfaces of said metal sheet. 2. In an apparatus of the characterdescribed, in combination, a kettle for containing a bath of adhesivematerial, means for feeding a metal sheet through said bath to coat themetal sheet with adhesive material, and spreading rolls between whichthe coated metal sheet is passed, said spreading rolls having helicallyarranged channels on their circumferences.

3. In an apparatus of the character described, in combination, a kettlefor containing a. bath of adhesive material, means for feeding a metalsheet through said bath to their circumferences and one of said spread=ing rolls having an annularchannel between its ends.

In testimony whereof, I have signed my name to this specification.

JAMES H. CAFFREY.

